html, body {
  height: 100%;
  padding: 0;
  margin: 0;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  font-family: 'STKaiti';
  background-color: #f4f4f4;
}

.english {
  font-family: '微软雅黑';
}

.title {
  font-size: 40px;
  color: #444;
}

.sub-title {
  margin: 20px 0;
}

.zhui-btn {
  margin: 0 10px;
}

.zhui-tag-wrapper {
  margin: 20px 10px;
  transform-origin: top;
  animation: swing 1.7s infinite;
}

@keyframes swing {
  0% {
    transform: rotatez(7deg);
  }
  50% {
    transform: rotatez(-7deg);
  }
  100% {
    transform: rotatez(7deg);
  }
}
